Implementation and thickness optimization of perpetual pavements in Ohio : [executive summary].
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2015-06-01
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Abstract:Perpetual asphalt pavements are designed to confine distresses to the upper layer of the structure, by eliminating
or reducing the potential for fatigue cracking by maintaining the horizontal strains at the bottom of the pavement
below a critical fatigue endurance limit (FEL). While there have been a number of successful installations of
perpetual pavements, there are still questions to be answered in order to achieve a comprehensive understanding of
the design of such pavements. For example, although various endurance limits have been proposed, none have been
determined and field validated for efficient design. The National Center for Asphalt Technology (NCAT) suggested
the FEL value for most perpetual pavement designs is in the range of 70 to 100 µε. However, based on the results of
different in-service pavement sections, some researchers suggested the Fatigue Resistance Layer (FRL) can
withstand up to 150 µε depending on the type of mixture used.
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